Which method for maintaining Right of Way (ROW) utilizes machines that cannot be handheld?

The method for maintaining Right of Way (ROW) that utilizes machines that cannot be handheld is mechanical means. Mechanical ROW maintenance involves the use of heavy machinery or equipment such as tractors, mowers, and other mechanized tools to manage vegetation and clear pathways. This approach is particularly effective for large areas where manual labor would be impractical or inefficient.

Mechanical methods are advantageous because they can quickly cover vast areas, effectively control unwanted vegetation, and do so in a way that is less labor-intensive compared to handheld methods. Additionally, this approach allows for more precise and uniform clearing, which can help in maintaining the safety and accessibility of utility lines and easements.

In contrast, the other methods mentioned do not involve machines that cannot be handheld. Chemical methods typically involve the application of herbicides, which are usually dispensed using handheld sprayers or small mechanized devices. Biological methods utilize living organisms to control unwanted vegetation, while cultural practices focus on managing the environment or ecological factors that affect plant growth, often relying on manual techniques rather than heavy machinery.